Remove failure delegation and just use the block (for mark as read).
Remove failure delegation and just use the block (for mark as read).

grosch/ios-library,manuyavuz/ios-library,ipmobiletech/ios-library,mikerowan/ios-library,mikerowan/ios-library,ipmobiletech/ios-library,manuyavuz/ios-library,mikerowan/ios-library,grosch/ios-library,zhangqinghe/ios-library,grosch/ios-library,manuyavuz/ios-library,zhangqinghe/ios-library,ipmobiletech/ios-library,zhangqinghe/ios-library